aggregate (adj.)

c. 1400, from Latin aggregatus "associated, united," past participle of aggregare "add to (a flock), lead to a flock, bring together (in a flock)," figuratively "attach, join, include; collect, bring together," from ad "to" (see ad-) + gregare "to collect into a flock, gather," from grex (genitive gregis) "a flock,"from PIE root *ger- "to gather."

c. 1400, "bring together in a sum or mass," from Latin aggregatus, past participle of aggregare "attach, join, include; collect, bring together," literally "bring together in a flock," from assimilated form of ad "to" (see ad-) + gregare "to collect into a flock, gather," from grex (genitive gregis) "a flock" (from PIE root *ger- "to gather"). Intransitive meaning "Come together in a sum or mass" is from 1855. Related: Aggregated; aggregating.

"number of persons, things, etc., regarded as a unit," early 15c., from Latin noun use of adjective aggregatum, neuter of aggregatus "associated, united," literally "united in a flock" (see aggregate (adj.)).